MHTCET 14 May 2023 Shift 2 Solved Paper

Section: Mathematics

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Question : 81 of 150

Marks: +1, -0

The p.m.f. of a random variable X is P(x)={

‌

2x

n(n+1)

, x=1,2,3,...n

0

, ‌ otherwise ‌

then E(X) is

‌
n+1
6
‌
2n+1
6
‌
n+1
3
‌
2n+1
3

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